7stacks lets you pin multiple folders to your Windows 7 taskbar
Alastria software's 7stacks has the solution. It's a small (about 800Kb) program that creates OsX-like stacks as standalone shortcuts. Unlike your native Windows 7 folders, each 7stacks shortcut behaves like a separate executable - so you can pin as many as you like to your taskbar.
Apart from the stack view, you can also display folder contents as a menu (plain old lists) and grid (pictured).
To see 7stacks in action, you can watch a brief demo I captured after the break.
[via Into Windows]